ASCLEPIADACEAE (MILKWEED FAMILY) 319 



CLIMBING MILKWEED 



Gondlobus laevis, Miehx. 



(Ampelanus dlbidus, Britton) 



(Enslenia dlbida, Nutt.) 



Other English names: Angle-pod, Sand Vine, White Swallow-wort. 

 Native. Perennial. Propagates by seeds. 

 Time of bloom: June to August. 

 Seed-time: August to October. 



Range: Pennsylvania to Kansas, southward to Florida and Texas. 

 Habitat : Fence rows and thickets, waste places ; also troublesome 

 in cultivated ground. 



Vines such as this furnish a good argument against too many 

 fences, as it is practically impossible to clean out the weed with- 

 out removing its support. Steins eight to twelve or more feet 

 long, slender, twining, smooth or minutely hairy in lines, filled 

 with milky juice. Leaves three to five inches long, opposite, thin, 

 heart-shaped, long-pointed, smooth, entire, with long petioles. 

 Flowers in axillary cymose clusters, very small, bell-shaped, five- 

 lobed, cream-white, fragrant; stamens five, the filaments united 

 into a short tube ; stigma slightly two-lobed ; peduncles rather 

 stout, not so long as the leaves, pedicels thread-like, longer than 

 the flowers. Follicles three to five inches long, erect, smooth, 

 wing-angled. Seeds flat, brown, tufted with silken hair. 



Means of control 



The weed is a persistent one and frequent and deep cutting is 

 necessary in order to keep it in check, beginning when it is in early 

 bloom and repeating as new shoots put forth. Dry salt or a few 

 drops of carbolic acid will help in retarding new growth. 



BLACK SWALLOW-WORT 



Cyndnchum nlgrum, Pers. 

 (Vincetdxicum nlgrum, Moench) 



Introduced. Perennial. Propagates by seeds. 



Time of bloom : June to September. 



Seed-time: August to October. 



Range: Massachusetts to Michigan, Pennsylvania, and Ohio. 



Habitat: Old fields, fence rows, thickets, and waste places. 



